A video was recently posted on YouTube which appears to be an unpublished Cesium-137 forecast produced by the Norwegian Institute for Air Research (NILU). According to the video’s description, the unpublished forecast was found while on the back end of the NILU website at this address: http://squid.nilu.no/~burkhart/sharing/

The forecast is no longer accessible, but was reported to be located here.

The Becquerels per meter scale is reduced in the unpublished forecast, which may account for the difference in cloud sizes.

Here is a video comparing the NILU’s published and unpublished Cs-137 forecasts for the same time period: